Although I have lots of experience with high whistles, this is my first low D. Heres what I found...
The build is really solid. The tuning is accurate. The mouthpiece is comfortable. The tone is lovely! The finger spacing is tough, but that's nothing to do with the design/build. It arrived in 8 days (from Ireland to California). It doesn't require a remarkable amount of air.
All in all, the quality of this instrument is very high, no doubt about it. And because it's at such an approachable price point, it allowed me, and hopefully others, to delve into low D whistle without breaking the bank.
I will be ordering my next James Dominic Whistle very soon!